The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 1994
Filed:
Jun. 01, 1992
Barrett E Guisinger, Saratoga, CA (US);
Harold V Clark, Los Altos, CA (US);
Datatape Incorporated, Pasadena, CA (US);
Abstract
In a helical scan recorder in which timing signals are recorded on adjacent slant tracks on magnetic tape, an automatic tracking technique for maintaining correct reproduce head to track positioning. The automatic tracking technique includes reproducing recorded timing signals from adjacent slant tracks on magnetic tape, producing first and second simultaneous repetitive reference signals which are coherent with the reproduced timing signals and which are 180.degree. out of phase with each other, simultaneously sampling each of the reference signals with the reproduced timing signals, selecting from the sampled reference signal the signals which are sampled in the mid-range of values thereof, and comparing the selected sampled reference signals and producing a tracking error signal if there is a difference therein.